Gm used the trailing arms. on Oldsmobile before they did on trucks. In the 50's we built a 36 chevy coupe using a 49 olds donor, engine, trans, rear end and the trailing arms. and we used both the olds and chevy shock absorbers at the rear . later the swap with a 31 chrysler roadster. and nobody ever beat us off the line , or was close at the other end either !